Chapter 3 Fuel Injection Equipment
12. Fuel Injection Nozzle
i4LHA Serie
(4) Clean the nozzle seat
with
cleaning spray.
(5) Clean
off
the carbon on the
tip of
nozzle
with
a
piece
of
wood.
(6) Clean hole type nozzles
with
a nozzle cleaning needle.
Nozzle
cleaning needle (piano
wire)
0.2mm
dia.
wire, 22mm long x 5 wires
C
1
Part code no.
28210-000010
12-3.2
Nozzle
inspection
(1) Inspect for scratches/wear
Inspect
oil
seals
for
abnormal scratches
or
wear
and
replace nozzle
if the
nozzle sliding surface
or
seat
are
scratched or abnormally wom.
(2) Check nozzle sliding
Wash
the nozzle and nozzle body in clean diesel oil, and
make sure
that
when
the
nozzle
is
pulled
out
about half
way
from
the body,
it
slides down
by
itself when releas-
ed.
Rotate the nozzle
a
little;
replace nozzle/nozzle body as
a
set if
there are some places where
it
does
not
slide
smoothly.
(3) Inspecting stop plate (inter-piece)
Check
for
scratches/wear
in
seals on
both
ends, check
for abnormal wear on the surface where
it
comes in con-
tact
with
the nozzle; replace
if
stop plate
is
excessively
wom.
Nozzle
contact surface
Seal
surface
Hole type
NT
mm (in.)
Nozzle
contact surface wear
limit
0.1 (0.0039)
(4) Inspecting nozzle spring
Replace
the
nozzle spring
if it is
extremely bent,
or the
surface is scratched or rusted.
(5) Nozzle holder
Check
oil
seal surface
for
scratches/wear; replace
if
wear is
excessive.
12-4
Fuel
injection
nozzle reassembly
The fuel injection nozzle
is
reassembled
in the
opposite
order to disassembly.
(1)
Insert
the
adjusting shims, nozzle spring
and
nozzle
spring seat
in the
nozzle holder, mount
the
stop plate
with
the pin,
insert
the
nozzle body/nozzle
set and
tighten
the nut.
(2) Use
the
special holder when tightening
the nut for the
hole type nozzle as in disassembly.
Nozzle
nut tightening torque
N-m(kgf-m)
Hole type nozzle
39.2-44.1 (4-4.5)
4LHA-HTE/HTZA/HTP/HTZP
Nozzle
type
140P285
KOT
P/N
119172-53050
3-1-61
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